Improve Nostr link handling

Fixes a bunch of problems with how Nostr links are created and replaced
in Markdown content

tests/nostr/links_test.ts

@@ -0,0 +1,62 @@
+import { beforeAll, describe, it } from "@std/testing/bdd";
+import { expect } from "@std/expect";
+import { replaceNostrUris } from "../../nostr/links.ts";
+
+describe("Nostr links", () => {
+
+  describe("#replaceNostrUris", () => {
+    let mdContent: string;
+    let result: string;
+
+    beforeAll(async () => {
+      mdContent = Deno.readTextFileSync("tests/fixtures/article-2.md"),
+      result = await replaceNostrUris(mdContent);
+    });
+
+    it("does not replace URIs in URLs", () => {
+      expect(result).toMatch(new RegExp("https://badges.page/p/npub1cpmvpsqtzxl4px44dp4544xwgu0ryv2lscl3qexq42dfakuza02s4fsapc"));
+    });
+
+    it("does not replace URIs in fenced code blocks", () => {
+      expect(result).toMatch(new RegExp("Follow nostr:npub1am3ermkr250dywukzqnaug64cred3x5jht6f3kdhfp3h0rgtjlpqecxrv7"));
+    });
+
+    it("does not replace URIs in inline code blocks", () => {
+      expect(result).toMatch(new RegExp("raucao: nostr:npub1raustrrh5gjwt03zdj8syn9vmt2dwsv9t467m8c3gua636uxu89svgdees"));
+    });
+
+    describe("for unknown usernames", () => {
+      it("replaces plain nostr:id URIs with a markdown link", () => {
+        expect(result).toMatch(/Amber scheme 1\: \[npub1am3ermkr250dywukzqnaug64cred3x5jht6f3kdhfp3h0rgtjlpqecxrv7\]\(https\:\/\/njump\.me\/npub1am3ermkr250dywukzqnaug64cred3x5jht6f3kdhfp3h0rgtjlpqecxrv7\)/);
+        expect(result).toMatch(/Amber scheme 2\: \[npub1am3ermkr250dywukzqnaug64cred3x5jht6f3kdhfp3h0rgtjlpqecxrv7\]\(https\:\/\/njump\.me\/npub1am3ermkr250dywukzqnaug64cred3x5jht6f3kdhfp3h0rgtjlpqecxrv7\)/);
+      });
+
+      it("replaces @id URIs with a markdown link", () => {
+        expect(result).toMatch(/Amber at 1\: \[@npub1am3ermkr250dywukzqnaug64cred3x5jht6f3kdhfp3h0rgtjlpqecxrv7\]\(https\:\/\/njump\.me\/npub1am3ermkr250dywukzqnaug64cred3x5jht6f3kdhfp3h0rgtjlpqecxrv7\)/);
+        expect(result).toMatch(/Amber at 2\: \[@npub1am3ermkr250dywukzqnaug64cred3x5jht6f3kdhfp3h0rgtjlpqecxrv7\]\(https\:\/\/njump\.me\/npub1am3ermkr250dywukzqnaug64cred3x5jht6f3kdhfp3h0rgtjlpqecxrv7\)/);
+      });
+
+      it("replaces nostr links with external links", () => {
+        expect(result).toMatch(/Amber scheme link 1\: \[Amber\]\(https\:\/\/njump\.me\/npub1am3ermkr250dywukzqnaug64cred3x5jht6f3kdhfp3h0rgtjlpqecxrv7\)/);
+        expect(result).toMatch(/Amber scheme link 2\: \[Amber\]\(https\:\/\/njump\.me\/npub1am3ermkr250dywukzqnaug64cred3x5jht6f3kdhfp3h0rgtjlpqecxrv7\)/);
+      });
+    });
+
+    describe("for known usernames", () => {
+      it("replaces plain nostr:id URIs with a markdown link", () => {
+        expect(result).toMatch(/raucao scheme 1\: \[npub1raustrrh5gjwt03zdj8syn9vmt2dwsv9t467m8c3gua636uxu89svgdees\]\(\/@raucao\)/);
+        expect(result).toMatch(/raucao scheme 2\: \[npub1raustrrh5gjwt03zdj8syn9vmt2dwsv9t467m8c3gua636uxu89svgdees\]\(\/@raucao\)/);
+      });
+
+      it("replaces @id URIs with a markdown link", () => {
+        expect(result).toMatch(/raucao at 1\: \[@npub1raustrrh5gjwt03zdj8syn9vmt2dwsv9t467m8c3gua636uxu89svgdees\]\(\/@raucao\)/);
+        expect(result).toMatch(/raucao at 2\: \[@npub1raustrrh5gjwt03zdj8syn9vmt2dwsv9t467m8c3gua636uxu89svgdees\]\(\/@raucao\)/);
+      });
+
+      it("replaces scheme links with internal links", () => {
+        expect(result).toMatch(/raucao scheme link 1\: \[raucao\]\(\/@raucao\)/);
+        expect(result).toMatch(/raucao scheme link 2\: \[raucao\]\(\/@raucao\)/);
+      });
+    });
+  });
+});